Biodegradability Investigation of a Nonphenolic Aircraft Paint Stripper
Final rept. Mar-Dec 1973
AIR FORCE WEAPONS LAB KIRTLAND AFB NM
Pagination or Media Count:
Paint stripping of aircraft and ground equipment is conducted periodically for the prevention of intergranular corrosion of the metallic surfaces. Wastewater occurs when the viscous paint stripper is rinsed from the aircraft or ground equipment surface with a high-pressure water system. The necessity and cost of on-site treatment of phenolic aircraft paint stripping wastewater have generated an urgent need to develop a nonphenolic paint stripper that is effective for removing polyurethane and epoxy paint. A nonphenolic paint stripper for example, Turco 5873 is effective in removing at least some polyurethane and epoxy paints. Thus, a study was made by the Air Force Weapons Laboratory AFWL to determine if existing biological treatment processes were effective in treating the resulting nonphenolic paint stripping wastewater. The results of laboratory-scale investigations indicate that biological treatment processes are satisfactory if 1 the methylene chloride concentration is previously reduced and, 2 the chemical oxygen demand contribution from the paint stripper does not exceed 200 mgl.
- Solvents, Cleaners and Abrasives
- Water Pollution and Control